Roll preparation method and roll

Abstract

The invention provides a method for preparing rolls and rolls. The method for preparing rolls of the present invention includes the following steps: firstly smelting molten iron in the outer layer of rolls with qualified components, and then heating to 1500-1550°C for 30 minutes; Pre-add silicon-zirconium alloy and rare earth ferrosilicon alloy; when the temperature of the molten iron drops to 1390-1420°C, take the molten iron out of the furnace into the ladle, and remove the slag after it is released; then when the temperature of the molten iron drops to 1350±5°C, add Ferrosilicon alloy, stir until fully melted; prepare a funnel in advance at the pouring position, and pre-load ferrosilicon particles in the funnel; when the temperature of the molten iron drops to 1330±5°C, move the ladle to the pouring position for pouring, and at the same time make the ferrosilicon The particles enter the cavity evenly with the poured molten iron. The preparation method of the roll of the present invention can improve the uniformity of the outer layer structure of the roll, and make the working layer of the roll better maintain the consistency of the structure in different thickness ranges, and the hardness drop is small, the wear resistance is high, and the roll surface Strong ability to maintain precision.

Description

technical field [0001] The invention relates to the technical field of roll preparation, in particular to a roll preparation method. Simultaneously, the invention also relates to a roll manufactured by using the roll preparation method. Background technique [0002] The roll is the main working part and tool for continuous plastic deformation of the processed metal on the rolling mill. In the existing roll preparation method, when preparing the outer layer of the roll, high-nickel-chromium molten iron is used, and ferrosilicon particles are used to inoculate the molten iron once or twice when it comes out of the furnace, and the molten iron is added by adding 0.2%- Precious alloys such as 1.0% V, 0.2%-1.5% Nb or 0.2%-1.0% W can improve the structure of the outer layer of the roll, that is, the working layer. [0003] The existing roll preparation method has the following problems: [0004] 1. A large amount of precious alloy is used, the production cost is high, and the r...

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Problems solved by technology

[0004] 1. Using a large amount of precious alloys, the production cost is high and the resource consumption is large

[0005] 2. Due to the large difference in specific gravity, different alloys are prone to segregation in the working layer, which affects product quality

[0006] 3. The inoculation method and inoculant are greatly affected by the inoculation temperature and time, the inoculation effect is different, and the product quality consistency is poor

[0007] 4. When the working layer with high nickel and chromium is solidified, it is affected by the chilling effect of the mold. The structure of the working layer at different depths is quite different, and the hardness drop is large.

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